A couple of months ago, we were rolling down Columbia Pike in Arlington trying to find an Ethiopian bakery that was mentioned in a Washington Post article about unlikely Redskins fans. As we were stressing out about possibly overshooting our destination, we noticed a stand-alone shack perched in front of the Adams Square shopping center. San Vicente looked like it had been a Little Tavern or an Ollie’s Trolley in a previous life, but the…